HBASE-23284 Fix Hadoop wiki link in Developer guide to "Distributions and Commercial Support"

[ndimiduk]

Signed-off-by: Nick Dimiduk ndimiduk@apache.org

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 5s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ master Compile Tests _
+1 💚	mvninstall	5m 54s	master passed
+0 🆗	refguide	6m 19s	branch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Patch Compile Tests _
+1 💚	mvninstall	5m 33s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+0 🆗	refguide	6m 13s	patch has no errors when building the reference guide. See footer for rendered docs, which you should manually inspect.
		_ Other Tests _
+1 💚	asflicense	0m 16s	The patch does not generate ASF License warnings.
		26m 30s

Subsystem	Report/Notes
Docker	Client=19.03.4 Server=19.03.4 base: https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-821/1/artifact/out/Dockerfile
GITHUB PR	#821
Optional Tests	dupname asflicense refguide
uname	Linux 17d9bc053fc9 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 05:24:09 UTC 2019 x86_64 GNU/Linux
Build tool	maven
Personality	/home/jenkins/jenkins-slave/workspace/HBase-PreCommit-GitHub-PR_PR-821/out/precommit/personality/provided.sh
git revision	master / 9494c12
refguide	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-821/1/artifact/out/branch-site/book.html
refguide	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-821/1/artifact/out/patch-site/book.html
Max. process+thread count	52 (vs. ulimit of 10000)
modules	C: . U: .
Console output	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-821/1/console
versions	git=2.11.0 maven=2018-06-17T18:33:14Z)
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